Revert "Add dev_compiler to the SDK build process."

sdk/bin/dartdevc_sdk

-#!/usr/bin/env bash
-# Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-# Run dev compiler on the Dart VM. This script assumes the Dart SDK's
-# directory structure.
-
-function follow_links() {
-  file="$1"
-  while [ -h "$file" ]; do
-    # On Mac OS, readlink -f doesn't work.
-    file="$(readlink "$file")"
-  done
-  echo "$file"
-}
-
-# Unlike $0, $BASH_SOURCE points to the absolute path of this file.
-PROG_NAME="$(follow_links "$BASH_SOURCE")"
-
-# Handle the case where dart-sdk/bin has been symlinked to.
-BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
-SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"
-
-SDK_ARG="--dart-sdk=$SDK_DIR"
-
-SNAPSHOT="$BIN_DIR/snapshots/dartdevc.dart.snapshot"
-
-# We are running the snapshot in the built SDK.
-DART="$BIN_DIR/dart"
-exec "$DART" "$SNAPSHOT" "$SDK_ARG" "$@"